(138a) The Solubility of N2 & O2 in Liquid CO2 near the Critical Point

Authors: 
Gerdemann, S., U.S. Department of Energy
Ochs, T., National Energy Technology Laboratory, U.S. Department of Energy
Oryshchyn, D., National Energy Technology Laboratory, U.S. Department of Energy
Summers, C., U.S. Department of Energy


Accurate prediction of the solubility of O2 and N2 in liquid CO2 is required for the Integrated Pollutant Removal (IPR) process, which uses compression and condensation of coal combustion products for pollutant capture. However, equations of state for the ternary CO2, N2, and O2 system fail at conditions near the critical point of CO2, and existing data from the literature are limited. Consequently the USDOE/Albany Research Center (ARC) has designed an apparatus for examining vapor-liquid equilibrium compositions in this region. The design of the apparatus and initial experimental results are presented and compared with literature values and equations of state.